This post, leveraging AI, summarizes and analyzes the key aspects of the research paper “The 2dF Galaxy Redshift Survey: Near Infrared Galaxy Luminosity Functions⋆”. For in-depth information, please refer to the original PDF.
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English Summary
This paper combines the 2MASS extended source catalog and the 2dF galaxy redshift survey, creating an infrared-selected galaxy catalogue with 17,173 measured redshifts. The authors use this extensive dataset to estimate galaxy luminosity functions in J- and KS-bands by Schechter functions. They carry out a careful investigation of possible systematic effects in their data, estimating the present-day distributions of bJ−KS and J−KS colours as a function of absolute magnitude using models constrained by observed optical and infrared colours. The paper concludes with estimates of galaxy stellar mass fractions for stars in units of critical density assuming Kennicutt IMF (ℒstarsh = (1.6 ± 0.24)× 10−3) or Salpeter IMF (ℒstarsh = (2.9 ± 0.43)× 10−3). The results obtained are consistent with previous observational estimates of the total star formation history in the universe provided that dust extinction corrections are modest.
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Key Technical Terms
Below are key technical terms and their explanations to help understand the core concepts of this paper. You can explore related external resources via the links next to each term.
- Galaxy Luminosity Function [Wikipedia (Ko)] [Wikipedia (En)] [나무위키] [Google Scholar] [Nature] [ScienceDirect] [PubMed]
Explanation: Estimate galaxy luminosities for given bands using Schechter functions, constrained by observed optical and infrred colours; helps infer stellar mass fractions (Kennicutt IMF or Salpeter IM) - Stellar Mass Fraction [Wikipedia (Ko)] [Wikipedia (En)] [나무위키] [Google Scholar] [Nature] [ScienceDirect] [PubMed]
Explanation: Total star formation history estimated assuming Kennicutt IMF or Salpeter IM; units of critical density - Galaxy Surface Brightness Distribution [Wikipedia (Ko)] [Wikipedia (En)] [나무위키] [Google Scholar] [Nature] [ScienceDirect] [PubMed]
Explanation: Investigation of possible systematic effects in galaxy luminosity functions, surface brightness distribution not affected by surface brightness but overall a substantial fraction of the sky coverage is covered by 2MASS.
View Original Excerpt (English)
Mon. Not. R. Astron. Soc. 000, 000–000 (0000) Printed 25 October 2018 (MN LATEX style file v1.4) The 2dF Galaxy Redshift Survey: Near Infrared Galaxy Luminosity Functions⋆ Shaun Cole1, Peder Norberg1, Carlton M. Baugh1, Carlos S. Frenk1, Joss Bland- Hawthorn2, Terry Bridges2, Russell Cannon2, Matthew Colless3, Chris Collins4, Warrick Couch5, Nicholas Cross6, Gavin Dalton7, Roberto De Propris5, Simon P. Driver6, George Efstathiou8, Richard S. Ellis9, Karl Glazebrook10, Carole Jackson3, Ofer Lahav8, Ian Lewis2, Stuart Lumsden11, Steve Maddox12, Darren Madgwick8, John A. Peacock13, Bruce A. Peterson3, Will Sutherland13, Keith Taylor2 (The2001 2dFGRS Team) 1Department of Physics, University of Durham, Science Laboratories, South Road, Durham DH1 3LE, United Kingdom 2Anglo-Australian Observatory, P.O. Box 296, Epping, NSW 2121, AustraliaDec 3Research School of Astronomy & Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, L14 1LD, UK11 4Astrophysics5Department of Astrophysics, University of New South Wales, Sydney, NSW2052, Australia 6School of Physics and Astronomy, North Haugh, St Andrews, Fife, KY16 9SS, United Kingdom 7Department of Physics, Keble Road, Oxford OX1 3RH, United Kingdom 8Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom 9Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA 10Department of Physics & Astronomy, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 212182686, USA 11Department of Physics & Astronomy, E C Stoner Building, Leeds LS2 9JT, United Kingdom 12School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom 13Institute of Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, United Kingdom 25 October 2018 ABSTRACT We combine the 2MASS extended source catalogue and the 2dF galaxy redshift sur- vey to produce an infrared-selected galaxy catalogue with 17,173 measured redshifts. We use this extensive dataset to estimate the galaxy…
🇰🇷 한국어 보기 (View in Korean)
한글 요약 (Korean Summary)
이 논문은 2MASS 확장 소스 카탈로그와 2DF Galaxy Redshift Survey를 결합하여 17,173 개의 측정 된 적색 편이로 적외선이 선택된 갤럭시 카탈로그를 만듭니다. 저자는이 광범위한 데이터 세트를 사용하여 Schechter 기능에 의한 J- 및 KS- 대역에서 은하 광도 기능을 추정합니다. 그들은 데이터에서 가능한 체계적인 효과에 대한 신중한 조사를 수행하여 관찰 된 광학 및 적외선 색상으로 제한된 모델을 사용하여 절대 크기의 함수로서 BJ-K 및 J-K 색상의 현재 분포를 추정합니다. 이 논문은 Kennicutt IMF (ℒStarsh = (1.6 ± 0.24) × 10-3) 또는 Salpeter IMF (ℒStarsh = (2.9 ± 0.43) × 10-3)를 가정하여 임계 밀도 단위의 별에 대한 은하의 별 질량 분획의 추정으로 끝납니다. 얻어진 결과는 먼지 멸종 보정이 적당하다는 경우 우주에서 총 별 형성 이력의 이전 관찰 추정치와 일치한다.
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주요 기술 용어 (한글 설명)
- Galaxy Luminosity Function
설명 (Korean): 관찰 된 광학 및 인프 레드 색상에 의해 제한된 Schechter 기능을 사용하여 주어진 밴드에 대한 은하 광도를 추정하고; 항성 질량 분획을 추론하는 데 도움이됩니다 (Kennicutt IMF 또는 Salpeter IM)
(Original English: Estimate galaxy luminosities for given bands using Schechter functions, constrained by observed optical and infrred colours; helps infer stellar mass fractions (Kennicutt IMF or Salpeter IM)) - Stellar Mass Fraction
설명 (Korean): Kennicutt IMF 또는 Salpeter IM을 가정하여 총 별 형성 기록; 임계 밀도의 단위
(Original English: Total star formation history estimated assuming Kennicutt IMF or Salpeter IM; units of critical density) - Galaxy Surface Brightness Distribution
설명 (Korean): Galaxy 광도 기능에서 가능한 체계적인 효과의 조사, 표면 밝기에 영향을받지 않지만 전반적으로 하늘 커버리지의 상당 부분이 2Mass로 덮여 있습니다.
(Original English: Investigation of possible systematic effects in galaxy luminosity functions, surface brightness distribution not affected by surface brightness but overall a substantial fraction of the sky coverage is covered by 2MASS.)
발췌문 한글 번역 (Korean Translation of Excerpt)
몬. 아니다. R. Astron. 사회 000, 000–000 (0000) 2018 년 10 월 25 일 인쇄 (MN 라텍스 스타일 파일 v1.4) 2DF Galaxy Redshift Survey : 근접한 은하계 광도 기능 ⋆ Shaun Cole1, Peder Norberg1, Carlton M. Baugh1, Carlos S. Frenk1, Joss Bland- Hawthorn2, Terry Bridge2, 러셀 캐나다 브리지 2. Colless3, Chris Collins4, Warrick Couch5, Nicholas Cross6, Gavin Dalton7, Roberto de Propris5, Simon P. Driver6, George Efstathiou8, Richard S. Ellis9, Karl Glazebrook10, Carole Jackson3, Ofer Lahav8, Ian Lewis2, Stuart Lums11, Steve Maddox12, Stuart Lums11 John A. Peacock13, Bruce A. Peterson3, Will Sutherland13, Keith Taylor2 (The2001 2DFGRS 팀) 1 Durham 대학교, 과학 연구소, South Road, Durham DH1 3LE, United United United United United Durham University, Science Laboratories, Science Laboratories, P.O. Box 296, Epping, NSW 2121, AustraliaDec 3Research School of Astronomy & Astrophysics, Australian National University, Weston Creek, Act 2611, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, L14 1ld, UK11 4 Newspysics, Of South -Newshysics, Of South -Newsonsics, Of South -Newsonsics, Egerton Wharf. NSW2052, 호주 물리 및 천문학, North Haugh, St Andrews, Fife, KY16 9SS, United Khysics 7 Department, Keble Road, Oxford Ox1 3RH, Astronomy의 제 8 회, Cambridge 대학, Madingley Road, Cambridge CB3 0HA, CAMBRONG, CAMERANC, ASTRONCY, ASTRONCY, ASTRONCY, ASTROMY, ASTRONCY, ASTROCITMONT OF CAMBRIDGE, MADINGLEY ROAD. PASADENA, CA 91125, USA 10 물리 및 천문학, Johns Hopkins University, 3400 North Charles Street Baltimore, MD 212182686, USA 11 DEPARTMENT of Physics & Astronomy, E C Stoner Building, Leeds LS2 9JT, Physics and Astronomy, University of University of Notting H, Astronomy of University of Univers. 제 2 차 영국 천문학, 에든버러 대학교 천문학 제 13 일, 에딘버러로 왕실 Eh9 3HJ, 영국 2018 년 10 월 25 일 초록 우리는 2MASS 확장 소스 카탈로그와 2DF 갤럭시 레드 시프트 수술을 결합하여 17,173 개 측정 레드 시프트를 사용하여 적외선 선택 갤럭시 카탈로그를 생성합니다. 우리는이 광범위한 데이터 세트를 사용하여 은하계를 추정합니다 …
Source: arXiv.org (or the original source of the paper)
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