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What are the open questions regarding analysis of the NEOWISE mid-infrared survey catalog to identify novae candidates?

Extinction (astronomy)

Cataclysmic variable star

Infrared dark cloud

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The open questions regarding the analysis of the NEOWISE mid-infrared survey catalog to identify novae candidates include the following: (1) What is the mid-infrared evolution of type Ia supernovae with long-lived mid-infrared detections? (2) Is there a difference in the variability characteristics between Fermi-detected blazars and non-Fermi-detected blazars, as well as between FSRQs and BL Lacs? (3) How reliable are the identified infrared dark clouds (IRDCs) in the catalog, and what fraction of them may be spurious identifications? (4) Can the identified IRDCs and their cores be verified as actual cold, dark clouds through additional data? (5) Are V723 Sco and AR Cir recurrent novae based on their infrared colors and luminosities?

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Open access•Journal Article•DOI A near-infrared survey of old novae – I. The discovery of a candidate recurrent nova Thomas E. Harrison 01 Nov 1992-Monthly Notices of the Royal Astronomical Society 14 Citations	The given text does not provide any information about the NEOWISE mid-infrared survey catalog or its analysis for identifying novae candidates.
Journal Article•DOI A Catalog of MSX Infrared Dark Cloud Candidates Robert Simon, James M. Jackson, Jill Rathborne, E. T. Chambers - Show less +3 more 02 Nov 2005-arXiv: Astrophysics 251 Citations	The given text does not provide any information about the analysis of the NEOWISE mid-infrared survey catalog to identify novae candidates.
Journal Article•DOI A Catalog of Midcourse Space Experiment Infrared Dark Cloud Candidates Robert Simon, Robert Simon, James M. Jackson, Jill Rathborne, Edward Chambers - Show less +4 more 01 Mar 2006-The Astrophysical Journal 252 Citations	The given text does not provide any information about the analysis of the NEOWISE mid-infrared survey catalog or the identification of novae candidates.
Journal Article•DOI Mid-infrared variability of blazars: a view from NEOWISE survey Lisheng Mao, Xuemei Zhang, Tingfeng Yi - Show less +2 more 13 Jul 2018-Astrophysics and Space Science 11 Citations	The paper does not mention any open questions regarding the analysis of the NEOWISE mid-infrared survey catalog to identify novae candidates.
Journal Article•DOI Mid-infrared Detections of Type I Supernovae and Unclassified Possible Supernovae with NEOWISE Melina Thévenot, Jean Marc Gantier, Martin Kabatnik, Jörg Schümann, Leopold Gramaize - Show less +4 more 01 Mar 2021	The paper does not mention any open questions regarding the analysis of the NEOWISE mid-infrared survey catalog to identify nova candidates.

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Which papers dictated novae in the infrared?5 answersRecent infrared studies of classical novae have confirmed the nucleation and growth of dust in nova ejecta, providing evidence that dust of every astrophysical chemical and mineral composition can condense in nova ejecta. In addition, an atlas of near-infrared spectrophotometry of symbiotic novae has been presented, covering several known symbiotic novae observable from the northern hemisphere. Interferometric studies of novae in the optical and near-infrared have also emerged as a field of study, providing new insights into the nova phenomenon, particularly in the early stages of the eruption.

Which papers has found novae in the infrared?5 answersNovae detections in the infrared have been reported in the papers by Evans et al., Harrison and Johnson, and Shafter et al..

Which paper found NOVA candidates in IR?3 answersThe paper by Madrid et al.found classical nova candidates in the giant elliptical galaxy M87 using the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). They made 13 positive identifications of near-ultraviolet (NUV) transient sources and derived light curves for these transients, identifying them as classical nova candidates. They determined a hard lower limit for the nova rate in M87 of 64 novae per year and observed an enhancement in the frequency of nova events towards the nucleus of the galaxy. No correlation was found with either jet activity or the position of present-day globular clusters.

Why do we require a minimum magnitude change of two or three to identify novae in NEOWISE data?0 answersA minimum magnitude change of two or three is required to identify novae in NEOWISE data because it allows for the detection of significant changes in the brightness of the objects. This magnitude change threshold helps to distinguish novae from other sources of variability in the data. By setting a minimum magnitude change requirement, it ensures that only objects that exhibit a substantial increase in brightness are classified as novae. This is important because novae are characterized by sudden and dramatic increases in luminosity, which can be indicative of explosive events occurring in the stellar system. Therefore, by requiring a minimum magnitude change of two or three, it helps to identify and differentiate novae from other types of objects in the NEOWISE data.

Why is a twelve-month window a better period for identifying novae using the Wide-field Infrared Explorer Catalog?5 answersA twelve-month window is a better period for identifying novae using the Wide-field Infrared Explorer Catalog because it allows for more data to be collected during the initial rise, peak, and decline of the novae. This is important because many novae reach peak magnitudes that are close to the detection limits of the catalog, making it challenging to obtain sufficient data. However, even with these limitations, the catalog was able to produce light curves that contained more data at and around the initial rise, peak, and decline of the novae compared to other variable star catalogs. The high cadence of the Wide-field Infrared Explorer instrument also allows for the detection of low amplitude variations in the light curves of the novae.

Which infrared literatures are most relevant to my research on novae detections using the Wide-field Infrared Survey Explorer catalog?2 answersInfrared observations of novae using the Wide-field Infrared Survey Explorer (WISE) catalog are relevant to your research. These observations provide valuable information about the thermal emission by dust formed during eruption and the ejected gas mass. The VISTA Variables in the Vía Láctea survey (VVV) is a near-IR ESO Public Survey that can contribute to the search for and study of novae in crowded and high-extinction regions of the Milky Way. In recent years, infrared spectroscopy has revolutionized our understanding of the nova phenomenon by revealing fine-structure and coronal lines, as well as the mineralogy of nova dust. The WISE five-year survey data has been used to compile an all-sky mid-infrared variable-star catalog, which includes carefully selected periodic variables that can be used to study Galactic structure, extinction properties, and constrain stellar evolution theory.

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